Electric heat radiator



April 1, 1924; 1,488,483

A. J. ELLIS ET AL ELECTRI C HEAT RADIATOR Filed Nov. 22, 1921,-

I Patented Apr. 1, 1924.

UNITED STATES PATENT OFFICE.

amazon JOHN ELLIS AND nuns coornn VINES, or SYDNEY, NEW scorn wanna,

, AUSTRALIA.

ELECTRIC HEAT RADIATOR.

Application filed November 22, 1921. Serial No. 518,979.

To all whom it may concern:

Be it known that we, ARTHUR JOHN ELLIs and JAMES COOPER VINES, subjects of the ternally wound With-high resistance wire.

In radiators of this type we are aware that it has been proposed to construct the refractory core in the form of a hollow dome, with its outer surface either converging outwards or inwards, it has also been proposed to form the core in the form of a ho(lilow dome supported by a central bolt or These different forms of the refractory core are faulty in practice in so far that only a portion of the surrounding reflector is illuminated thus detracting from its appear- ?nce, and lessening the heat radiating surace.

A further defect in electric heat radiators as at present constructed is the cost of mountin and wiring necessitating as it does the emp oyment of skilled labour, and the use of many and ex ensive parts such as insulatin washers, b0 ts, nuts and such like.

Now t e ob'ect of this invention is to remedy these efects by providin a complete selfcontained heating unit w llCll will give the maximum heating and illuminating effect, and which can be mounted and connected to the source of power by any unskilled person.

A further object of the invention is to provide a perfectly insulated element which can be handled with safety.

The invention comprises a hollow approximately spherical, or double cone shaped core of refractory material having integral therewith a solid projecting plug externally screw threaded, and an opposing aperture. A high resistance wire spirally wound in. grooves formed in the external surface of the said core and l'iaving its ends attached to conductors passing through the said ping, screwed terminals on ends or" said conductors with intermediate insulating:

partition; and a covering cap adapted to screw on the said projecting plug.

But in order that the invention may be clearly understood reference will now be made to the drawings which accompany and form part of this complete specification and in which Figure 1 is a small sectional elevation showing a heat radiator constructed according to this invention.

Figure 2 is approximately a full sized sectional elevation of heating unit mounted in position.

Figure 3 is a front view of same.

Figure 4 is a perspective view showin end of projecting plug with terminals an intermediate partition,

Figure 5 shows the covering and clamping cap removed from projecting plug.

The heating unit consists of a hollow approximately spherical core body 7 of porcelain or other refractory material with a solid cylindrical extension 8 projectin therefrom, and a circular aperture 9. g helical groove 10 is formed around the outer surface of the spherical body 7 and a high resistance wire 11 preferably of the coiled type is wound therein. One end 12 of the resistance wire passes through an aperture 13 in core body and is attached to conductor bolt 14 which passes through plug 8 and is held in position by screw terminal 15.

The other end of the resistance wire after passing through aperture 16 in core body 7 is formed into a loop or loops 17 and then secured to conductor bolt 18 which passes through plug 8 and has on its outer end screw terminal 19..

The ends of. the conduction wires 20 and 21 from the outside supply pass respectively through the holes 22 and 23 in insulating partition 24 and are connected to the terminals 15 and 19 by terminal screws 25.

The core body 7, solid projecting plug 8, and insulating partition 24, are moulded or otherwise formed of the same material integral with each other.

The plug 8 has moulded or otherwise formed on its outer surface a screw thread of coarse pitch, and the heating unit is simply and easily mounted and supported in. the reflector 28 by pz-iseing the ping 8 through the central. aperture therein screwing thereon the metal cap 27 which is screw threaded and adapted for the purpose. The flange 28 on cap 27 clamps the reflector 26 against the shoulder 29 on core body 7.

The reflector 26 is supported on a stand of any suitable design and in any well known way such as illustrated in Figure 1.

The conduction wires 20 and 21 pass through aperture in covering cap 27 which is provided with an insulating bush 31. .The terminals 15 and 19 are therefore fully protected and all insulating washers, supporting bolts, and nuts and other fittings are done away with. If desired a double cone shaped core body may be substituted for the spherical body, the projecting plug 8 and insulating partition 24: remaining of course as hereinbefore described and illus trated.

The loop or loops of resistance wire 17 formed in or near the aperture 9 illuminate the interior of the core and light the otherwise black spot in the centre of the core body.

We claim 1. A heating unit for an electric heat radiator comprising a substantially spherical shaped hollow core body provided with an integral cylindrical member, conductors extending through said member to the interior of the core body, a perforated'ir'i'sulating partition projecting axially from said mem er for insulating the electrical conductors, and a resistance wire spirally wound on the external surface of the core body and extending through it to the interior thereof connected with the conductors, said resistance wire being coiled within the core body and the latter having an opening in line with said coil.

2. In an electric heat radiator a heating unit comprising a hollow core body of refractory material approximately spherical in contour and having a circular aperture, :1 solid screw threaded extension projecting from said core body, a hclically twisted high resistance wire spirally wound in grooves formed-inthe external surface of the said core body and looped within same, electric conductors passing through the said solid extension, screw terminals on ends of said conductors, a perforated insulating partition between said terminals and a screw threaded metal covering and clamping cap, with insulating bush substantially as herein described and illustrated in the drawings.

In testimony whereof they have affixed their signatures in thepresence of two wit hesses.

ARTHUR JOHN ELLIS. I JAMES COOPERVINES. IVitnesses:

T. C. ALLEN, Jr., N. E. GODDARD. 

